157results about How to "Uniform concentration distribution" patented technology

The invention relates to a spread method of a polycrystalline silicon solar cell. The spread method is characterized in that the spread method comprises the following processing steps of entering a boat, warming, oxidizing, spreading, redistributing, cooling and going out the boat, wherein the spreading step comprises low temperature pre-deposition and then high temperature spreading. Reaction between a phosphorus source and a silicon wafer cannot be completed under low temperature, so that the low temperature pre-deposition is carried out on low temperature source communication at a first step of spreading, the phosphorus source cannot spread (or conduct spreading with low rate) inside a silicon wafer, the phosphorus source only accumulates on the surface of the silicon wafer, and a phosphorus film with certain thickness is formed on the surface of the silicon wafer after source communication for certain time; and the high temperature spreading is carried out on high temperature source communication at a second step, phosphorus on the surface of an original silicon wafer is reacted with the silicon wafer and spreads to the inside of the silicon wafer, and spreading rates of the center point and the periphery of the silicon wafer are same. Therefore, spreading uniformity is good, concentration distribution of impurities on the surface of the silicon wafer and inside the silicon wafer body is even, sheet resistance uniformity is improved, and final photoelectric conversion efficiency of a cell sheet is improved accordingly.

The invention provides a disinfection device. The disinfection liquid is recovered from a cleaning slot to a disinfection tank after the completion of the cleaning disinfection processing of the endoscope in the cleaning slot. After the recovery of the disinfection liquid, a concentration measurement control portion (157) measures the concentration of the disinfection liquid at the concentration sensor (132). The concentration measured by the concentration sensor (132) is inputted into a determination portion (158), and it is determined whether it is suitable for performing disinfection for the endoscope within the range of the concentration value. An input control portion (161) outputs the cleaning information including the determination result to each output target. The cleaning controlportion (155) removes the locking mechanism (23) of the top cover of the cleaning slot when the determination result is appropriate. When the determination result is not appropriate, the locking stateof the locking mechanism is maintained before the further disinfection of the endoscope by the novel disinfection liquid. In another embodiment, when the determination result is not appropriate, rawliquid is supplied to the disinfection liquid into the disinfection liquid tank.

The present invention provides a burner, a combustor equipped with the burner, and a gas turbine, with which it is possible to premix a first hydrocarbon-based fuel (for example, natural gas), a second fuel (for example, hydrogen gas), and combustion air, and to spray into the combustion chamber of the combustor a thin and uniform concentration distribution of the premixed air, and with which it is possible to suppress the amount of NOx discharged. On the upstream side of the premix flow path, hydrogen gas is sprayed from second fuel spray nozzles, which project into the premix flow path, into the flow of the combustion air flowing toward the center from the outer edge of an outer cylinder, whereby a primary air-fuel mixture having a uniform concentration distribution is generated without affecting a low-speed region of the combustion air. Natural gas is then sprayed from first fuel spray nozzles into the primary air-fuel mixture, whereby the natural gas, which has a high specific gravity, and the primary air-fuel mixture are adequately mixed in a stirring fashion, and a secondary air-fuel mixture (premixed air) is generated that is lean and has a more uniform concentration distribution than the first air-fuel mixture. By combusting this type of premixed air in the combustion chamber, NOx in the combustion exhaust gas can be suppressed.

The invention relates to a test system for the extension of a multi-axis and salt-spray corrosion fatigue crack. The test system comprises a fatigue tester for providing I-type, II-type, III-type and compound fatigue loads required by a test for a test sample through a pull-cut-twist multi-axis loading fixture, and further comprises a salt-spray corrosion environmental box, wherein the salt-spray corrosion environmental box comprises a salt-spray corrosion box body and a salt-spray pre-occurrence box body which are mutually communicated through a pipeline; the salt-spray pre-occurrence box body conveys air and salt water required by salt-spray forming to the salt-spray corrosion box body; the salt-spray corrosion box body provides a required salt-spray corrosion environment for the fatigue crack extension test; both the pull-cut-twist multi-axis loading fixture and the fatigue crack extension test sample are positioned in the salt-spray corrosion box body. Through the adoption of the test system, the fatigue crack extension rate and other fracture mechanics parameters under the combined action of multi-axis loads and the salt-spray corrosion environment can be measured relatively well, and thus the material selection design and the service life evaluation for marine engineering equipment serving in the salt-spray corrosion environment and under a complex stress state can be supported.

The invention discloses a method for improving the denitration rate of an SCR (Selective Catalytic Reduction) denitration system of a power station boiler. The method comprises the following steps: (1) measuring concentration distribution of NOx at the outlet of an SCR denitration reactor; (2) calculating the unevenness Cv of concentration distribution of NOx according to the measuring result in the step (1); (3) when Cv is greater than 20%, adjusting the valve opening in an area corresponding to an ammonia injection grid according to the concentration distribution of NOx at the outlet of the SCR denitration reactor; (4) repeating the steps (1) to (3) until Cv is less than or equal to 20%. Through optimization and adjustment by the invention, the evenness of distribution of NOx at the outlet of the SCR denitration reactor is remarkably improved, and the relative standard deviation of NOx is reduced from 46.4% to 14.8%. On the premise of ensuring that ammonia escape does not exceed standard, the denitration rate is improved from 77% to 83%. The method disclosed by the invention has important guiding meaning and engineering application value to safe, efficient and stable operation of the SCR denitration system of the power station boiler.

The invention discloses an internal cold/internal heat type solution dehumidifying and regenerating device. A plurality of zigzag connected heat and mass transfer units consisting of reducing templates (2) and internal cold/internal heat pipes (1) are arranged in a shell (10), an inlet pipe (7) is arranged above the shell, and an outlet pipe (8) is arranged below the shell; a dehumidifying solution inlet pipe (5) is arranged above the heat and mass transfer units, a solution distributor (6) is arranged on the dehumidifying solution inlet pipe (5), and the bottom of the shell (10) is provided with a dehumidifying and regenerating solution delivery pipe (9). A dehumidifying solution flows into a pipeline through a solution inlet header pipe and is sprayed to the reducing templates to be in direct contact with wet air for carrying out a heat and mass transfer process so that the purpose of air dehumidifying or solution regenerating is achieved; and internal heat/internal cold branch pipes play a role of strengthening the heat and mass transfer process, thus the solution dehumidifying and regenerating efficiency is greatly improved. The internal cold/internal heat type solution dehumidifying and regenerating device has the advantages of simple machining process, low cost and easiness in production and manufacture.

The invention discloses a method for preparing a porous covalent organic material by using the ultra-gravity method, and belongs to the technical field of preparation of porous covalent organic materials. The method comprises the following steps: under a high gravity field, the micromixing and mass transferring process is strengthened, materials in a cavity of a preferable over-gravity rotary bed are sucked into a rotor of the rotary bed through a rotating inner spiral pipe, and the materials are sheared by, mixed and reacted with a filler rotating at a high speed in the rotor. Compared with reaction under a normal gravity filed, the method is greatly increased in reaction rate, and shortened in reaction time; besides, as for reaction systems sensitive to air, the water-free and oxygen-free reaction condition can also be achieved without a glove box, and compared with low-dosage preparation in the glove box, the method is greater in preparation amount and higher in production efficiency.

The invention discloses a full-automatic anti-residue automatic electroplating device. The full-automatic anti-residue automatic electroplating device comprises an installation bottom plate, wherein support bottom columns are fixedly connected to four corners of the top end of the installation bottom plate, support sliding rails are fixedly connected to the top ends of the support bottom columns,belt winding rollers are fixedly connected to the position, corresponding to the inner position of a lifting installation box, of the outer side of a lifting rotating shaft, and a surface cleaning mechanism is fixedly connected to the position, corresponding to the inner positions of support vertical plates, of the bottom end of a traction belt. A rotating motor drives a transmission rotating shaft and transmission bevel gears to rotate, the transmission bevel gears drive rotating vertical shafts and rotating bevel gears to rotate, then workpieces are driven to rotate through material hangingmechanisms, and in the rotating process of the workpieces, electroplate liquid and washing liquid left on the surfaces of the workpieces are separated from the workpieces under the action of centrifugal force, so that residual electroplate liquid and washing liquid are effectively prevented from being left on the workpieces and affecting next layer of electroplating of the workpieces, and the coating quality of the workpieces is improved.

The invention relates to a polyethylene-polystyrene resin and a preparation method thereof. The preparation method comprises the following steps of: performing pre-irradiation treatment on polyethylene resin by using beta rays or gamma rays; adding the polyethylene resin after the pre-irradiation treatment, a dispersing agent, a functional monomer, an emulsifying agent, a nucleating agent and a homopolymerization inhibiting agent into a reactor to perform suspension graft polymerization reaction for a certain period of time at a certain temperature; and filtering, washing and drying a suspension graft product to obtain the polyethylene-polystyrene resin. The concentrations of macromolecular peroxides generated by the pre-irradiation are distributed evenly, so side reactions such as monomer homopolymerization, polymer crosslinking and/or degradation and the like caused by a micromolecule chemical initiator are avoided; the percent grafting ratio reaches 21 to 42 percent; the homopolymerization inhibiting agent reduces the homopolymerization of the monomer in the suspension grafting process; and the polyethylene-polystyrene resin has the tensile strength of more than 22 MPa, breaking elongation of over 90 percent and elastic modulus of more than 480 MPa, and has good mechanical properties such as strength, tenacity, impact strength and the like.

The invention relates to a polyethylene-polystyrene foam, which is formed in a way that polystyrene is grafted on a molecular chain of polyethylene to connect the polyethylene with the polystyrene by a covalent chemical bond, wherein the grafting ratio mass percent of the grafted polystyrene is 25-60%, and the volume density of the polyethylene-polystyrene foam is 27-208kg/m<3>. The preparation method comprises the following steps: carrying out pre-irradiation treatment on the polyethylene; and adding the polyethylene after the pre-irradiation treatment, dispersant, functional monomer, emulsifying agent, nucleating agent and homopolymerization depressor to a reaction vessel to be subject to suspension graft polymerization reaction, adding foaming agent, cooling the reaction product, filtering, washing with water, drying, and heating to obtain the polyethylene-polystyrene foam. The polyethylene-polystyrene foam has the advantages of excellent mechanical property, favorable rebound elasticity, good stress cracking resistance, high impact absorbing capacity and the like, combines the flexibility of polyethylene foam and the rigidity of polystyrene foam, and is used in the fields of vehicles, buildings, packaging, heat preservation, heat insulation and the like.

A honeycomb catalyst carrier 5 of the present invention includes: a honeycomb formed cell structure 1 which is composed of a porous material having a large number of pores and has cells each functioning as a fluid passage; and an outer wall 6 composed of a porous material disposed so as to cover an outer periphery of the cell structure 1. An impregnated part 1a impregnated with a water-insoluble organic material which disappears by burning or an inorganic material is formed in an outermost peripheral part, which has a given thickness, of the porous material of the cell structure 1.

The invention relates to a system and process for coal seam permeability improvement by inducing hole drilling extraction later-period gas burning explosion. The left end of a connecting pipe (2) is connected with a first gas extraction pipe (1); the right end of the connecting pipe is connected with a sealed gas extraction drilling hole (17); a third electromagnetic valve (8) is arranged on a water conveying pipe (10); a water discharging pipe (13) is arranged on a pipeline for connecting the third electromagnetic valve and the connecting pipe; a fourth electromagnetic valve (9) is arranged on the water discharging pipe; a first electromagnetic valve, a second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, a temperature sensor, a methane sensor and a carbon monoxide sensor are connected with an intelligent controller (12) through connecting wires (11); and an electric spark igniter (14) is connected with an external power supply switch through a conducting wire. The system has the advantages that the operation is simple; the real-time monitoring can be realized; the manual coal seam burning explosion permeability improvement induction is realized; the gas permeability of a coal seam can be improved in a short time; and the problems of high-gas low-permeability coal seam gas extraction difficulty and fast extraction concentration reduction are solved.

The invention belongs to the field of fuel cells, and relates to a direct alcohol fuel cell electrode with an internal flow field, which has the advantages that fuel transfer resistance is small, electrolyte concentration in a diaphragm is high, concentration distribution of reactants is uniform, and discharge property is good. The direct alcohol fuel cell electrode comprises a flow field, a diffusion layer, catalysis layers and the diaphragm, wherein the diffusion layer, the catalysis layers and the diaphragm are sequentially arranged from outside to inside, the internal flow field with a fuel inlet is arranged between the catalysis layers and the diaphragm to ensure that a mixed fuel firstly enters the internal flow field; because the internal flow field is in contact with the diaphragm, the concentration of the electrolyte in the diaphragm is high, thus the conductivity of the diaphragm is increased; a mixture of the internal flow field enters the catalysis layers and generates a chemical reaction between the catalytic layers, products obtained after the reaction penetrate through the diffusion layer to reach an external flow field for being discharged. Due to a downstream conveying mode of the reactants and the products, the defects of uneven distribution of fuels upstream and downstream, large transfer resistance of the fuels, low concentration of the electrolyte in the diaphragm, and the like in a countercurrent conveying mode adopted by a conventional process are overcome, the cell property is greatly improved, and a good application prospect is achieved.

The invention relates to a tangential gas intake desulfurization tower of flue gas desulfurization technology of a semi-dry circulating fluidized bed. The tower is characterized in that: a flue gas intake structure is tangentially connected with the desulfurization tower, a desulfurizer inlet is positioned at the central position of the bottom of the desulfurization tower, a feed back inlet is positioned at the lower part of the desulfurization tower and a flue gas outlet is positioned at the top of the desulfurization tower. The tangential gas intake desulfurization tower has the advantages of causing the flue gas to form strong rotating flow in the desulfurization tower, improving turbulent intensity of gas flow, maintaining full contact between a desulfurizer and the flue gas, and intensifying desulfurization reaction process and greatly improving the utilization ratio of the desulfurizer; and the tangential flue gas intake structure can help effectively lower pressure drop of the system.

The invention provides an endoscope cleaning and disinfecting device and a method for preparing disinfection liquid used for the endoscope cleaning and disinfecting device, reduces the odor of peracetic acid leaked from bottle when replacing disinfection liquid. In the invention, a first bottle (39) containing peracetic acid condensed liquid (132) is installed in a first bottle installation unit (108); the condensed liquid (132) flows through a condensed liquid injection path (110), and is supplied to a disinfection liquid can (87); when a condensed liquid sensor (118) detects the condensed liquid (132) surface, bottle cleaning fluid (136) is injected from a bottle cleaning nozzle (112) to the first bottle (39); and the bottle cleaning fluid in the first bottle (39) is supplied to the disinfection liquid can (87) through the condensed liquid injection path (110). Thus, the condensed liquid (132) is diluted by water, i.e. the bottle cleaning fluid (136), and prepared into the disinfection liquid (86) with predetermined concentration.

An N type fin type field effect transistor and a formation method thereof. The formation method of N type fin type field effect transistor includes the following steps: a semiconductor substrate is provided which has a protruding fin part, the fin part includes a bottom region and an upper region which are adjacent to each other, and the bottom region is located under the upper region; an ion implantation technology is performed, B ions and F ions are implanted into the fin part, and an implantation region is formed in the bottom region of the fin part; after the ion implantation technology, an annealing process is performed, the B ions and F ions in the implantation region are activated, and a doping region is formed in the bottom region of the fin part; after the annealing process is performed, a gate structure which stretches across and covers surfaces of side wall and top parts of the fin part is formed; and a source region and a drain region are formed in the fin part at two sides of the gate structure. The method provided by the invention improves a capability of resisting source leakage punchthrough of the fin type field effect transistor by preventing diffusion of boron ions in the doping region.

The invention discloses a tangential double vortex SCR mixer. The mixer comprises a flue, the cross section of the flue is equidistantly provided with a support beam, the support beam divides the cross section of the flue into a plurality of mixer unit zones, the mixer unit zones comprises a mixer unit, the mixer unit comprises a group of trapezoidal plates, a group of nozzles, the support beam and support rods, the bottom edges of the trapezoidal plates are connected with the support beam, one ends of the support rods are fixed on the trapezoidal plates, the other ends of the support rods are fixed on the inner wall of the flue in order to form a certain angle between the support rods and flue gas, each of the nozzles is arranged between adjacent trapezoidal plates, and the nozzles of the group share a gas supply pipeline. The mixer makes a reducing agent to reach a catalyst upper layer and to be uniformly distributed, so the ammonia escape rate of ammonia at an SCR outlet is reduced, and the denitration efficiency is improved, thereby problems of insufficient reconstruction space and insufficient ammonia mixing distance of service sets in a power plant are effectively solved.

A preparation method of ultra-fine danazol powder belongs to the method of drug micronization. The method is that danazol solution and desolvation are first put into a supergravity rotating bed through a solution entrance 4 and a desolvation entrance 5 respectively at the same time, and the recrystallized danazol paste by the desolvation flows out from a discharge hole 1; the danazol paste is collected, filtered and dried to obtain the ultra-fine danazol powder. The method can obtain the ultra-fine danazol powder of controlled average grain size, controlled shape and narrow grain size distribution.

The invention relates to an SCR inlet flue gas pre-treatment system and method, relates to boiler pollutant control technology, and are used for new construction or renovation projects of ultra-cleanNOx emission of grate-firing coal-fired boilers. The SCR inlet flue gas pre-treatment system comprises a temperature regulating system, a urea solution or ammonia water solution ejector, and a cycloneequalization system. The system adopts a heating way of extracting high-temperature flue gas from a hearth outlet and then introducing the high-temperature flue gas into a cyclone tube, and a coolingway of adding a temperature-regulating economizer or extracting low-temperature flue gas from flue gas at a boiler dust collector outlet or an air preheater outlet and then introducing the low-temperature flue gas into the cyclone tube through a cold flue, and the average temperature of SCR inlet flue gas is controlled within the working range of catalysts. A urea solution is ejected in a burnoutchamber through the urea solution ejector; an ammonia water solution is ejected at an inlet pipe of a cyclone separator through the ammonia water solution ejector; NH3 is produced under the action ofthe high-temperature flue gas and mixed into the flue gas. Under the combined action of a flow equalization board and the cyclone tube, the flue gas and NH3 are mixed uniformly to achieve the effectsof equal temperature, equal concentration field and equal velocity, thereby meeting the requirements on the temperature, concentration field and velocity field at an SCR inlet.

The invention provides an endoscope cleaning and disinfecting device and a method for preparing disinfection liquid used for the endoscope cleaning and disinfecting device, prevents the aging of disinfection liquid can and crystal precipitation caused by condensation liquid. In the invention, dilution liquid (132) is supplied to a supplied to a disinfection liquid can (87) through a dilution path (100), a second waste liquid path (96); when a dilution liquid sensor (118) detects the dilution liquid (132), the supply of the dilution liquid (132) is stopped; a bottle component (38) containing condensed disinfection liquid (134) is accepted by a bottle installation unit (108). Thus, the condensed liquid (134) does not contact the disinfection liquid can (87) directly, but is supplied to the disinfection liquid can (87) by a condensed liquid injection path (110), and is prepared into the disinfection liquid with predetermined concentration in the disinfection liquid can (87).